Long-service-life drill bit with built-in cooling flow guide cavity

Abstract

The long-service-life drill bit comprises a connecting section and a cutting section connected with the connecting section, a rotating ring is arranged between the connecting section and the cutting section, a liquid injection ring cavity is formed in the rotating ring, and a liquid injection port connected with the liquid injection ring cavity is formed in the outer side of the rotating ring. A liquid guide channel communicated with the liquid injection ring cavity is formed in the inner circumferential side of the rotating ring; a cooling and flow guiding main cavity is formed in the middle of the cutting section, a liquid inlet channel communicated with the cooling and flow guiding main cavity is formed in the connecting position of the connecting section and the cutting section, and the liquid inlet channel and the liquid guiding channel are horizontally distributed. The liquid injection ring cavity, the liquid injection port, the liquid guide channel, the cooling and flow guide main cavity, the liquid inlet channel and the cooling and flow guide branch cavities are arranged, the interior of the drill bit can be continuously cooled, the cooling effect of the drill bit is improved, and then the service life of the drill bit is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of drill bits, and particularly relates to a long-life drill bit with an internal cooling diversion cavity. Background Art

[0002] A drill bit is a tool used to drill through holes or blind holes in solid materials and can also ream existing holes. Commonly used drill bits mainly include twist drills, flat drills, center drills, deep hole drills, and trepanning drills.

[0003] When the existing drill bit is in use, external continuous pouring of coolant is used to cool the drill bit. However, during the long-term use of the drill bit, the heat inside the drill bit cannot be dissipated by the external pouring of coolant, resulting in a shortened service life of the drill bit. Therefore, we propose a long-life drill bit with an internal cooling diversion cavity. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a long-life drill bit with an internal cooling diversion cavity to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A long-life drill bit with an internal cooling diversion cavity, including a connection section and a cutting section connected to the connection section. A swivel ring is provided between the connection section and the cutting section. A liquid injection ring cavity is formed inside the swivel ring. A liquid injection port connected to the liquid injection ring cavity is provided on the outer side of the swivel ring. A liquid guiding channel communicating with the liquid injection ring cavity is formed on the inner peripheral side of the swivel ring;

[0006] A main cooling diversion cavity is formed in the middle of the cutting section. A liquid inlet channel communicating with the main cooling diversion cavity is formed between the connection section and the cutting section. The liquid inlet channel and the liquid guiding channel are horizontally distributed. Cooling diversion sub-cavities communicating with the main cooling diversion cavity are provided on the cutting section.

[0007] Preferably, a double-cone rotating groove adapted to the swivel ring is formed between the connection section and the cutting section. An arc-shaped ring groove is formed in the middle of the outer periphery of the double-cone rotating groove. An arc-shaped convex ring adapted to the arc-shaped ring groove is provided in the middle of the inner periphery of the swivel ring.

[0008] Preferably, a gap is provided between the swivel ring and the double-cone rotating groove, and a gap is provided between the arc-shaped ring groove and the arc-shaped convex ring.

[0009] Preferably, the liquid injection port is externally connected to a coolant delivery system.

[0010] Preferably, a plurality of liquid guiding channels are provided, and the plurality of liquid guiding channels are equally spaced on the inner peripheral side of the swivel ring.

[0011] Preferably, a plurality of the liquid inlet channels are provided, and the plurality of liquid inlet channels are equally spaced in the arc-shaped annular groove.

[0012] Preferably, a plurality of the cooling and diversion sub-chambers are provided, and the plurality of cooling and diversion sub-chambers are provided on the cutting section.

[0013] Preferably, the cooling and diversion sub-chamber is a circular chamber structure that is inclined downward from inside to outside.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] 1. The present utility model is provided with a liquid injection annular cavity, a liquid injection port, a liquid guiding channel, a cooling and diversion main chamber, a liquid inlet channel and a cooling and diversion sub-chamber. During use, the coolant enters the liquid injection annular cavity through the liquid injection port and then is discharged between the connecting section and the cutting section through the liquid guiding channel. Since the drill bit is in a rotating state at this time, the coolant will enter the cooling and diversion main chamber through the liquid inlet channel on the arc-shaped annular groove and then be diverted to the cutting section through the cooling and diversion sub-chamber, which can continuously cool down the inside of the drill bit, improve the cooling effect of the drill bit, and thus ensure the service life of the drill bit;

[0016] 2. The present utility model is provided with a double-cone rotating groove, an arc-shaped annular groove and an arc-shaped convex ring, so that the rotating ring can be rotatably arranged between the connecting section and the cutting section. When the drill bit rotates and operates, the rotating ring will not rotate, ensuring the normal use of the drill bit;

[0017] 3. There is a gap between the rotating ring and the double-cone rotating groove, and there is a gap between the arc-shaped annular groove and the arc-shaped convex ring. When the coolant enters between the connecting section and the cutting section, due to the existence of the gap, part of the coolant will also flow out through the gap, thereby cooling and cooling the outside of the drill bit and further improving the cooling effect of the drill bit. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-dimensional structure diagram of the present utility model;

[0019] Figure 2 is a sectional structure diagram of the present utility model;

[0020] Figure 3 is a partial three-dimensional structure diagram of the present utility model;

[0021] Figure 4 is a three-dimensional structure diagram of the rotating ring of the present utility model;

[0022] Figure 5 is a sectional structure diagram of the rotating ring of the present utility model.

[0023] In the figure: 1. Connecting section; 2. Cutting section; 3. Swivel; 4. Liquid injection ring cavity; 5. Liquid injection port; 6. Liquid guiding channel; 7. Main cooling and diversion cavity; 8. Liquid inlet channel; 9. Sub-cooling and diversion cavity; 10. Double-cone rotating groove; 11. Arc-shaped ring groove; 12. Arc-shaped convex ring. Specific implementation mode

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0025] Please refer to Figures 1-5 , the long-life drill bit with an internal cooling and diversion cavity provided by the present utility model includes a connecting section 1 and a cutting section 2 connected to the connecting section 1. A swivel 3 is arranged between the connecting section 1 and the cutting section 2. A liquid injection ring cavity 4 is opened in the swivel 3. A liquid injection port 5 connected to the liquid injection ring cavity 4 is arranged on the outer side of the swivel 3. The liquid injection port 5 is externally connected to a coolant delivery system. A liquid guiding channel 6 communicating with the liquid injection ring cavity 4 is opened on the inner peripheral side of the swivel 3. A plurality of liquid guiding channels 6 are provided, and the plurality of liquid guiding channels 6 are equally spaced on the inner peripheral side of the swivel 3;

[0026] A main cooling and diversion cavity 7 is opened in the middle of the cutting section 2. A liquid inlet channel 8 communicating with the main cooling and diversion cavity 7 is opened between the connection of the connecting section 1 and the cutting section 2. The liquid inlet channel 8 and the liquid guiding channel 6 are horizontally distributed. A plurality of liquid inlet channels 8 are provided, and the plurality of liquid inlet channels 8 are equally spaced in the arc-shaped ring groove 11. A sub-cooling and diversion cavity 9 communicating with the main cooling and diversion cavity 7 is arranged on the cutting section 2. A plurality of sub-cooling and diversion cavities 9 are provided, and the plurality of sub-cooling and diversion cavities 9 are arranged on the cutting section 2. The sub-cooling and diversion cavity 9 is a circular cavity structure that is inclined downward from the inside to the outside.

[0027] The present utility model is provided with a liquid injection ring cavity 4, a liquid injection port 5, a liquid guiding channel 6, a main cooling and diversion cavity 7, a liquid inlet channel 8 and a sub-cooling and diversion cavity 9. During use, the coolant enters the liquid injection ring cavity 4 through the liquid injection port 5 and then is discharged between the connecting section 1 and the cutting section 2 through the liquid guiding channel 6. Since the drill bit is in a rotating state at this time, the coolant will enter the main cooling and diversion cavity 7 through the liquid inlet channel 8 on the arc-shaped ring groove 11 and then be diverted to the cutting section 2 through the sub-cooling and diversion cavity 9, which can continuously cool and lower the temperature inside the drill bit, improve the cooling effect of the drill bit, and thus ensure the service life of the drill bit.

[0028] In this embodiment, as Figures 2-5As shown, a double-cone rotating groove 10 adapted to the rotating ring 3 is provided between the connection portions of the connecting section 1 and the cutting section 2. An arc-shaped ring groove 11 is provided in the middle of the outer periphery of the double-cone rotating groove 10. An arc-shaped convex ring 12 adapted to the arc-shaped ring groove 11 is provided in the middle of the inner periphery of the rotating ring 3. A gap is provided between the rotating ring 3 and the double-cone rotating groove 10, and a gap is provided between the arc-shaped ring groove 11 and the arc-shaped convex ring 12.

[0029] The utility model is provided with a double-cone rotating groove 10, an arc-shaped ring groove 11 and an arc-shaped convex ring 12, so that the rotating ring 3 can be rotatably arranged between the connection portions of the connecting section 1 and the cutting section 2. When the drill bit rotates, the rotating ring 3 will not rotate, ensuring the normal use of the drill bit.

[0030] In the utility model, a gap is provided between the rotating ring 3 and the double-cone rotating groove 10, and a gap is provided between the arc-shaped ring groove 11 and the arc-shaped convex ring 12. When the coolant enters between the connection portions of the connecting section 1 and the cutting section 2, due to the existence of the gap, part of the coolant will also flow out from the gap, thereby cooling and cooling the outside of the drill bit and further improving the cooling effect of the drill bit.

[0031] In summary, the usage method of the long-life drill bit with an internal cooling and diversion cavity provided in this embodiment: When in use, the coolant enters the liquid injection ring cavity 4 through the liquid injection port 5, and then is discharged between the connecting section 1 and the cutting section 2 through the liquid guiding channel 6. Since the drill bit is in a rotating state at this time, the coolant will enter the main cooling and diversion cavity 7 through the liquid inlet channel 8 on the arc-shaped ring groove 11, and then be diverted to the cutting section 2 through the sub-cooling and diversion cavities 9, which can continuously cool and cool the inside of the drill bit. When the coolant enters between the connection portions of the connecting section 1 and the cutting section 2, due to the existence of the gap, part of the coolant will also flow out from the gap, thereby cooling and cooling the outside of the drill bit.

[0032] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made in these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A long-life drill bit with a built-in cooling and flow-guiding cavity, characterized in that: The invention comprises a connecting section (1) and a cutting section (2) connected to the connecting section (1); a rotating ring (3) is arranged between the connecting section (1) and the cutting section (2); a liquid injection ring cavity (4) is provided in the rotating ring (3); a liquid injection port (5) connected to the liquid injection ring cavity (4) is arranged on the outer side of the rotating ring (3); and a liquid guide channel (6) communicating with the liquid injection ring cavity (4) is arranged on the inner circumference of the rotating ring (3); A cooling and flow guiding main cavity (7) is provided in the middle of the cutting section (2); a liquid inlet channel (8) communicating with the cooling and flow guiding main cavity (7) is provided between the connection section (1) and the cutting section (2); the liquid inlet channel (8) and the liquid guiding channel (6) are arranged horizontally; and a cooling and flow guiding sub-cavity (9) communicating with the cooling and flow guiding main cavity (7) is provided on the cutting section (2).

2. A long-life drill bit with a built-in cooling and flow-guiding cavity according to claim 1, characterized in that: A double-cone rotating groove (10) adapted to the rotating ring (3) is provided between the connection portion of the connecting section (1) and the cutting section (2), an arcuate annular groove (11) is provided in the middle of the outer circumference of the double-cone rotating groove (10), and an arcuate convex ring (12) adapted to the arcuate annular groove (11) is provided in the middle of the inner circumference of the rotating ring (3).

3. The long-life drill bit with a built-in cooling and flow guiding cavity according to claim 2, characterized in that: A gap is provided between the rotating ring (3) and the double-cone rotating groove (10), and a gap is provided between the arc-shaped annular groove (11) and the arc-shaped convex ring (12).

4. The long-life drill bit with a built-in cooling and flow guiding cavity according to claim 1, characterized in that: The liquid injection port (5) is externally connected to a coolant delivery system.

5. The long-life drill bit with a built-in cooling and flow guiding cavity according to claim 1, characterized in that: A plurality of the liquid guiding channels (6) are provided, and the plurality of the liquid guiding channels (6) are distributed at equal intervals on the inner circumference of the rotating ring (3).

6. The long-life drill bit with a built-in cooling and flow guiding cavity according to claim 2, characterized in that: A plurality of the liquid inlet channels (8) are provided, and the plurality of the liquid inlet channels (8) are distributed at equal intervals in the arc-shaped annular groove (11).

7. The long-life drill bit with a built-in cooling and flow guiding cavity according to claim 1, characterized in that: A plurality of the cooling and flow guiding sub-cavities (9) are provided, and the plurality of the cooling and flow guiding sub-cavities (9) are arranged on the cutting section (2).

8. The long-life drill bit with a built-in cooling and flow guiding cavity according to claim 1, characterized in that: The cooling and diversion sub-cavity (9) is a circular cavity structure arranged from the inside outward and inclined downward.

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